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Home >> Chevrolet >> 2005 >> Avalanche 2500 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 8.1L - Introduction >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: Removing/Installing ECT Sensor
    GM858203Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. If installing the old sensor, coat the threads with sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent.
  2. Install the ECT sensor.

    Tighten:  Tighten the sensor to 50 N.m (37 lb ft).

  3. Fig 2: Removing/Installing ECT Sensor Electrical Connector At Oil Fill Tube Bracket
    GM858201Courtesy of GENERAL MOTORS CORP.
  4. Install the ECT sensor electrical connector to the oil fill tube bracket.
  5. Fig 3: View Of Ignition Coil, ECT And MAP Sensor Electrical Connectors
    GM750529Courtesy of GENERAL MOTORS CORP.
  6. Connect the ECT sensor electrical connector (3).
  7. Refill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.